<template>
	<view class="container">
		<!-- 空白页 -->
		<view v-if="!hasLogin || empty===true" class="empty">
			<!-- <image src="/static/emptyCart.jpg" mode="aspectFit"></image> -->
			<view v-if="hasLogin" class="empty-tips">
				空空如也
				<navigator class="navigator" v-if="hasLogin" url="/pages/shopping/shopping" open-type="switchTab">随便逛逛>
				</navigator>
			</view>
			<view v-else class="empty-tips">
				空空如也
				<view class="navigator" @click="navToLogin">去登录></view>
			</view>
		</view>
		<view v-else>
			<!-- 列表 v-else -->
			<view class="cart-list">
				<block v-for="(item, index) in cartList" :key="item.id">
					<view class="cart-item" :class="{'b-b': index!==cartList.length-1}">
						<view class="image-wrapper">
							<image :src="`${tempUrl}${item.pic}`"></image>
							<!-- 	<image :src="`../../static/mode/${item.image}`" :class="[item.loaded]" lazy-load
								@load="onImageLoad('cartList', index)" @error="onImageError('cartList', index)"></image> -->
							<view class="yticon icon-xuanzhong2 checkbox" :class="{checked: item.checked}"
								@click="check('item', index)"></view>
						</view>
						<view class="item-right">
							<text class="clamp title">{{item.gname}}</text>
							<text class="attr">{{item.specs}}</text>
							<text class="price">¥{{item.price}}</text>
							<div class="clacClass">
								<uni-icons  @click="susbus(item,index)"
									type="minus" 
									size="20" style="vertical-align: middle;"></uni-icons>
								<span style="width: 20px;">{{item.quantity}}</span>
								<uni-icons @click="add(item,index)"
									type="plus" size="20" style="vertical-align: middle;"></uni-icons>
							</div>
							<!-- <fui-input-number 
							    :value="item.quantity" 
								:index="index"
								@change="changeCart(index,item)"
											min="1" max="10" ></fui-input-number> -->
							<!-- 	<uni-number-box v-model:value="item.quantity"  
										color="#000" min="1" max="10" 
										@blur="changeCart(item)"
										@change="changeCart(item)" 
							           /> -->
						</view>
						<text class="del-btn yticon icon-fork" @click="deleteCartItem(index)"></text>
					</view>
				</block>
			</view>

			<!-- 底部菜单栏 -->
			<view class="action-section">
				<view class="checkbox">
					<image :src="allChecked?'../../static/cart/selected.png':'../../static/cart/select.png'"
						mode="aspectFit" @click="check('all')"></image>
					<view class="clear-btn" :class="{show: allChecked}" @click="clearCart">
						清空
					</view>
				</view>
				<view class="total-box">
					<text class="price">¥{{total}}</text>

				</view>
				<button type="primary" class="no-border confirm-btn" @click="createOrder">去结算</button>
			</view>
		</view>
	</view>
</template>

<script>
	import {
		mapState,
		mapMutations
	} from 'vuex';
	import {
		addCarts,
		getCarts,
		deleteCarts,
		updateCarts
	} from "../../api/cart.js"
	import {
		baseUrl
	} from "@/common/js/request.js"
	export default {
		data() {
			return {
				max:10,
				min:1,
				count: 0,
				tempUrl: '',
				total: 0, //总价格
				allChecked: false, //全选状态  true|false
				empty: false, //空白页现实  true|false
				cartList: [],
				
			};
		},
		watch: {
			//显示空白页
			cartList(e) {
				console.log("空白页")
				let empty = e.length === 0 ? true : false;
				if (this.empty !== empty) {
					this.empty = empty;
				}
			}
		},
		computed: {
			...mapState(['hasLogin', 'userInfo'])
		},
		onShow() {
			this.loadData()
		},
		onLoad(options) {
			
			// const item = option.data ? JSON.parse(decodeURIComponent(option.data)) : '';
			//    console.log(item)
		},
		created() {
			this.user = this.$store.state.userInfo;
			this.tempUrl = this.baseUrl
			this.loadData();
		},
		onPullDownRefresh() {
			this.loadData()
		},
		methods: {
			//请求数据
			loadData() {
				// let list = await this.$api.json('cartList'); 
				// let list= []
				getCarts({
					uid: this.user.uid
				}).then(res => {
					if (res.code == 200) {
						this.cartList = res.data
					}
				})
				if(!this.allChecked){
					let cartList = this.cartList.map(item => {
						item.checked = false;
						return item;
					});
					this.cartList = cartList;
				}
				this.calcTotal(); //计算总价
			},
			//监听image加载完成
			onImageLoad(key, index) {
				this.$set(this[key][index], 'loaded', 'loaded');
			},
			//监听image加载失败
			onImageError(key, index) {
				this[key][index].image = '../../static/selected/errorImage.jpg';
			},
			navToLogin() {
				uni.navigateTo({
					url: '/public/login/login'
				})
			},
			//选中状态处理
			check(type, index) {
				if (type === 'item') {
					this.cartList[index].checked = !this.cartList[index].checked;
				} else {
					const checked = !this.allChecked
					const list = this.cartList;
					list.forEach(item => {
						item.checked = checked;
					})
					this.allChecked = checked;
				}
				this.calcTotal(type);
			},
			// //数量
			// numberChange(data) {
			// 	this.cartList[data.index].number = data.number;
			// 	this.calcTotal();
			// },
			//删除
			deleteCartItem(index) {
				let list = this.cartList;
				let row = list[index];
				let id = row.carId;
				deleteCarts([id]).then(res => {
					if (res.code == 200) {
						this.cartList.splice(index, 1);
					} else {
						that.$commonFunc.msg("失败")
					}
				})

				this.calcTotal();
				uni.hideLoading();
			},
			//清空
			clearCart() {
				uni.showModal({
					content: '清空购物车？',
					success: (e) => {
						if (e.confirm) {
							let ids=this.cartList.map(item=>item.carId)
							deleteCarts(ids).then(res=>{
								if(res.code==200){
									this.total = 0;
									this.cartList = [];
									this.$commonFunc.msg("清空成功")
								}else{
									this.$commonFunc.msg("清空失败")
								}
							})
						}
					}
				})
			},
			//计算总价
			calcTotal() {
				let list = this.cartList;
				if (list.length === 0) {
					this.empty = true;
					return;
				}
				let total = 0;
				let checked = true;
				list.forEach(item => {
					if (item.checked === true) {
						total += item.price * item.quantity;
					} else if (checked === true) {
						checked = false;
					}
				})
				this.allChecked = checked;
				this.total = Number(total.toFixed(2));
			},

			susbus(item,index){
				let num=this.cartList[index].quantity
				if(num>this.min){
					--num;
					updateCarts({
						carId:this.cartList[index].carId,
						quantity:num
						}).then(res=>{
						if(res.code==200){
							this.loadData();
						}
					})
				}
			},
			add(item,index){
				let num=this.cartList[index].quantity
				if(num<this.max){
					++num;
					updateCarts({
						carId:this.cartList[index].carId,
						quantity:num
						}).then(res=>{
						if(res.code==200){
							this.loadData();
						}
					})
				}
			},
			//创建订单
			createOrder() {
				let list = this.cartList;
				let goodsData = [];
				list.forEach(item => {
					if (item.checked) {
						goodsData.push(item)
					}
				})
				if(goodsData.length>0){
					uni.navigateTo({
						url: `/shopping/order/createOrder?data=${encodeURIComponent(JSON.stringify({name:'duls',data:goodsData}))}`
					})
				}else{
					this.$commonFunc.msg("至少选择一个商品")
				}
				// console.log(goodsData)
				
				// this.$api.msg('跳转下一页 sendData');
			}
		}
	}
</script>

<style lang='scss' scoped>
	.container {
		padding-bottom: 134upx;

		/* 空白页 */
		.empty {
			position: fixed;
			left: 0;
			top: 0;
			width: 100%;
			height: 100vh;
			padding-bottom: 100upx;
			display: flex;
			justify-content: center;
			flex-direction: column;
			align-items: center;
			background: #fff;

			image {
				width: 240upx;
				height: 160upx;
				margin-bottom: 30upx;
			}

			.empty-tips {
				display: flex;
				font-size: $font-sm+2upx;
				color: $font-color-disabled;

				.navigator {
					color: $uni-color-primary;
					margin-left: 16upx;
				}
			}
		}
	}

	.cart-list {
		margin: 20rpx;
	}

	/* 购物车列表项 */
	.cart-item {
		display: flex;
		position: relative;
		padding: 30upx 40upx;
		border-bottom: 1px solid #dedede;

		.image-wrapper {
			width: 230upx;
			height: 230upx;
			flex-shrink: 0;
			position: relative;

			image {
				width: 200rpx;
				height: 200rpx;
				border-radius: 8upx;
			}
		}

		.checkbox {
			position: absolute;
			left: -16upx;
			top: -16upx;
			z-index: 8;
			font-size: 44upx;
			line-height: 1;
			padding: 4upx;
			color: $font-color-disabled;
			background: #fff;
			border-radius: 50px;
		}

		.item-right {
			display: flex;
			flex-direction: column;
			flex: 1;
			overflow: hidden;
			position: relative;
			padding-left: 30upx;

			.title,
			.price {
				font-size: $font-base + 2upx;
				color: $font-color-dark;
				height: 40upx;
				line-height: 40upx;
			}

			.attr {
				font-size: $font-sm + 2upx;
				color: $font-color-light;
				height: 50upx;
				line-height: 50upx;
			}

			.price {
				height: 50upx;
				line-height: 50upx;
			}
		}

		.del-btn {
			padding: 4upx 10upx;
			font-size: 34upx;
			height: 50upx;
			color: $font-color-light;
		}
	}

	/* 底部栏 */
	.action-section {
		/* #ifdef H5 */
		margin-bottom: 100upx;
		/* #endif */
		position: fixed;
		left: 30upx;
		bottom: 30upx;
		z-index: 95;
		display: flex;
		align-items: center;
		width: 690upx;
		height: 100upx;
		padding: 0 30upx;
		background: rgba(255, 255, 255, .9);
		box-shadow: 0 0 20upx 0 rgba(0, 0, 0, .5);
		border-radius: 16upx;

		.checkbox {
			height: 52upx;
			position: relative;

			image {
				width: 52upx;
				height: 100%;
				position: relative;
				z-index: 5;
			}
		}

		.clear-btn {
			position: absolute;
			left: 26upx;
			top: 0;
			z-index: 4;
			width: 0;
			height: 52upx;
			line-height: 52upx;
			padding-left: 38upx;
			font-size: $font-base;
			color: #fff;
			background: $font-color-disabled;
			border-radius: 0 50px 50px 0;
			opacity: 0;
			transition: .2s;
			display: none;

			&.show {
				display: inline-block;
				opacity: 1;
				width: 120upx;
			}
		}

		.total-box {
			flex: 1;
			display: flex;
			flex-direction: column;
			text-align: right;
			padding-right: 40upx;

			.price {
				font-size: $font-lg;
				color: $font-color-dark;
			}

			.coupon {
				font-size: $font-sm;
				color: $font-color-light;

				text {
					color: $font-color-dark;
				}
			}
		}

		.confirm-btn {
			padding: 0 38upx;
			margin: 0;
			border-radius: 100px;
			height: 76upx;
			line-height: 76upx;
			font-size: $font-base + 2upx;
			background: $uni-color-primary;
			box-shadow: 1px 2px 5px rgba(217, 60, 93, 0.72)
		}
	}

	/* 复选框选中状态 */
	.action-section .checkbox.checked,
	.cart-item .checkbox.checked {
		color: $uni-color-primary;
	}

	.numberBox {
		width: 240rpx;
		height: 60rpx;
		/* background-color: #000; */
	}

	.clacClass {
		width: 100px;
		display: flex;
		justify-content: space-between;
		margin: 10px 0;
		height: 30px;
		align-items: center;
	}
</style>
